With an area of 10,192 square miles (26,397 km2), Inyo County is the second-largest county by area in California, after San Bernardino County. Almost one-half of that area is within Death Valley National Park. However, with a population density of 1.8 people per square mile, it also has the second lowest population density in California.

The county is unique out of California's other counties because of the geographic locations. The county includes both the lowest and highest places in the state, Badwater Basin and Mount Whitney, the latter of which it shares with Tulare County. The difference between the two locations is about 14,700 feet.

For many years it has been commonly believed that the county derived its name from the Mono tribe of Native Americans name for the mountains in its former homeland. Actually the name came to be thought of, mistakenly, as the name of the mountains to the east of the Owens Valley when the first whites there asked the local Paiutes what the name of the mountains to the east was.

The local Paiutes responded that that was the land of Inyo. They meant by this that those lands belonged to the Shoshone tribe headed by a man whose name was Inyo. Inyo was the name of the headman of the Panamint band of Paiute-Shoshone people at the time of contact when the first whites, the Manly expedition of 1849, wandered, lost, into Death Valley on their expedition to the gold fields of western California. The Owens Valley whites misunderstood the local Paiute and thought that Inyo was the name of the mountains when actually it was the name of the chief, or headman, of the tribe that had those mountains as part of their homeland.

"Indian George", a fixture of many of the stories of early Death Valley days, was Inyo's son. Indian George's Shoshone name was "Bah-Vanda-Sa-Va-Nu-Kee", which means "The Boy Who Ran Away", a name he was given when he became terrified of the whites and their wheeled wagons and huge buffalo, none of which the Shoshone had ever seen before when they came wandering down Furnace Creek Wash in December 1849. In 1940, when Bah-vanda was around 100 years old, JC Boyles, a Panamint Shoshone who had become educated, came back to the Panamint Valley and interviewed Bah-Vanda at length about the early days of his life, including the events of 1849, and it is in this interview (which can be found in the February 1940 issue of The Desert Magazine) that Bah-vanda refers to his father, Inyo.

Thirteen of California's fifteen peaks which exceed 14,000 feet (a Fourteener) in elevation; the isolated Mount Shasta in northern California, and White Mountain Peak in neighboring Mono County, are the only California 14ers not (at least partly) in Inyo County

It is the hottest and driest of the national parks in the United States. It also features the second-lowest point in the Western Hemisphere and the lowest point in North America at the Badwater Basin, which is 279 feet (85 m) below sea level.[11] It is home to many species of plants and animals that have adapted to this harsh desert environment. Some examples include Creosote Bush, Bighorn Sheep, Coyote, and the Death Valley Pupfish, a survivor of much wetter times. Approximately 95% of the park is designated as wilderness.[12] Death Valley National Park is visited annually by more than 770,000 visitors who come to enjoy its diverse geologic features, desert wildlife, historic sites, scenery, clear night skies, and the solitude of the extreme desert environment.

There were 7,703 households of which 27.9% had children under the age of 18 living with them, 49.8% were married couples living together, 9.9% had a female householder with no husband present, and 35.9% were non-families. 31.4% of all households were made up of individuals and 13.6% had someone living alone who was 65 years of age or older. The average household size was 2.31 and the average family size was 2.88.

24.4% of the population were under the age of 18, 5.8% from 18 to 24, 23.4% from 25 to 44, 27.3% from 45 to 64, and 19.1% who were 65 years of age or older. The median age was 43 years. For every 100 females there were 95.4 males. For every 100 females age 18 and over, there were 92.9 males.

The median household income was $35,006 and the median family income was $44,970. Males had a median income of $37,270 versus $25,549 for females. The per capita income for the county was $19,639. About 9.3% of families and 12.6% of the population were below the poverty line, including 16.0% of those under age 18 and 8.3% of those age 65 or over.

Notable locations

Furnace Creek, California (Hottest air temperature ever recorded here in 1913 at 134.6 degrees Fahrenheit. In July 1972, a ground temperature of 201 °F (93.9 °C) was measured in Furnace Creek. This may be the highest natural ground surface temperature ever recorded.)